powerpc: Remove redundant selection of E500 and E500MC

PPC_85xx and PPC_BOOK3E_64 already select E500 so no need
to select it again by PPC_QEMU_E500 and CORENET_GENERIC
as they depend on PPC_85xx || PPC_BOOK3E_64.

PPC_BOOK3E_64 already selects E500MC so no need to
select it again by PPC_QEMU_E500 if PPC64, PPC_BOOK3E_64
is the only way into PPC_QEMU_E500 with PPC64.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/44f03fa1506892fabf626dceb2f47a049908b6af.1663606876.git.christophe.leroy@csgroup.eu

arch/powerpc/platforms/85xx/Kconfig

@@ -241,8 +241,6 @@ endif # PPC32
 config PPC_QEMU_E500
 	bool "QEMU generic e500 platform"
 	select DEFAULT_UIMAGE
-	select E500
-	select PPC_E500MC if PPC64
 	help
 	  This option enables support for running as a QEMU guest using
 	  QEMU's generic e500 machine.  This is not required if you're
@@ -258,7 +256,6 @@ config PPC_QEMU_E500
 config CORENET_GENERIC
 	bool "Freescale CoreNet Generic"
 	select DEFAULT_UIMAGE
-	select E500
 	select PPC_E500MC
 	select PHYS_64BIT
 	select SWIOTLB